Valve mechanism.



. GOOD.

, VALVE MECHANISM. APPLICATION FILED HA8. 3- 19H.

- 1,156,991. Patented; Oct. 19, 1915.

JOHN.GOOD, OF FZRQOKJJYN, NEH YGRK.

VALVE Mechanism Specification of Letters Patent.

y A Paton tea wet. it?

Application filed March s, 1914. Serial at. teaser;

To all. whom it may concern:

Beit known that 1, JOHN G001), a citizen of tlge United States, residingat Brooklyn, in the county of Kings and State of New York, havescribed-new and useful Improvements in Valve 'Mechanisms. v

The invention relates to valve gear for internal combustion engines,pumps and like uses, and its object is to obtain the benefits of disk orother rotary valves without the objections arising from. the ordinarilyhigh frictional pressure of the disks upon" their seats. I

In accordance with the invention, separate admission and exhaust valvesare employed for the inlet and outlet ports of the engine or pumpcylinder, and these valves are connected together so that pressure maybe transmitted from one to the other and both valves are arranged to besubjected to the pressure within the cylinder. The seats ,for thevalves'may be arranged upon the same sides of the valves .50 that tl twovalves press in the same direction vars their seats. The pressure withinthe cylinder is then arranged to act-in opposite directions and inunequal degree upon the two valves, against their seats under a pressurewhich is the resultant of or difference between the two opposingpressures. The pressure within the cylinder can be made to act unequallyand in opposite directions upon the valves by arranging the valves onopposite sides of the cylinder or otherwise, whereby unequal areas ofthem will be exposed oppositely to the pressure fluid. 4

In the accompanying drawing I have illustrated an embodiment of theinvention as applied to gas engines, but it will be understood that theinvention may be utilized in various other relations.

In the drawing the figure is a sectional elevation of a gas or gasoleneengine showing the improved form' of valve-gear applied thereto.

Referring to the drawing, 2 indicates the cylinder of the engine,mounted upon a crank casing 3 in which the crank shaft 4 is journaled asusual. The cylinder head 5 is water jacketed and. forms part of thecombustion space 7 at the upper. end of the cylinder. This spaceincludes an inlet port 8-and an outlet port 9. To opposite sides of thehead 5 are secured the cover in vented the following-dc- .are controlledby rotary as a result of which both will be held plates 1t and 11, eachof wh ch has sageway formed tliTtllTfiU 1 alined with. the ports 8 andt? respectively and constitub ing an inlet 12 forthe combustible vaporand an outlet 15: for the exhaust of the products of combustion. It heapp ent theprecise formation of the pal s just scribed of no particularconsequence and may be varied as occasion The ports 8 and 9 differ iiport 8 being of somewhat tional area than the other. i

which are united to each other so Una-t strain may be transmitteddirectly from one to the other. In the present instance. these valvesare shown as disk -valves, the disk 1 controlling the inlet port 8 andthe disk 15 controlling the outlet port 9, but they might have otherforms as willlater appear. These two disks are ri ua -ed by be ingmounted. upon a it; which extends across the up i: c 'lii'zder, irough atubular part I? of the jacket w ith which it need not cry t of the twodisks 1% and 15 h s ing therethrough as shown at let valve) whichopening is ad: ter on the rotation of the shaft 1 v 8 or 9, as the casemay be, so as li) free passage leading to or from the in of thecvlinder. As indicated in the ing, the seat for the disk valve 14 theadjacent wall of the cover-plate it the seat for the dislvralve i5 isupon the a. jacent wall of the head 5, so that "318 ,1, Y sure upon thecombined valvemeinbers, to the left (in the figure), is necessary topress and maintain them a; net their his isprovidcd by the eatentofithe.

on sprockets 2,0 and E21 seem 16 and the engine shaft it will be evidentthat such Lil'lf tion has but a minimum of work toperforin since thefriction of the valves on their seats 18 reduced 1n the manner aboveexplained.

and received in cavities provided therefor in the members 10 and 11. Byturning these nuts 23 u pen the threaded portions oi? shaft 16, thedisks 14: and 15 may be located and held rigidly at the requiredsepavalve if (lepe ration, and if such separation does not happen to besuch 30 form the best contact with a valve seat, wear of one valve orthe other will soon correct the difference.

In the drawi a slight clearance is proided over the 7.308801 the valves1% and 15 opposite 'tllfi'EH-i which engage the valve seats. In one ae,this clearance is on'the inner side of the valve and in the other caseit is on the on ide. This clearance may be so slight that :e valve 1-1will. not be subjected to the vi uler pressure over the port, because ofthe "ct of its own rotationou the film of fluid seeking to enter thecrevice but if the clear such size that t ter it and act the valve 1-1or e a the valve, I. prefer to make uh diameter with respect to thevalve 15 a, to provide nevertheless the desired did. dial pressure,sutficient to maintain the ves securely-seated but less than that wh'would be eii'ective on either it and unconnrcteih To maintain he valvesnormally in engagement i tueir. seats 'aspring is coiled about the endof shaft 16 hearing at one end upon 1 bearing 25, and at its op: positeend or; washer 2 the latter being adjustably m i on the reduced threadedend 27 of the it 10 by meansoi nuts 25* lhese parts are all inclosedWithin a cov 2-!) threaded i" The cover-plate as indiea uu The springends to n'iaintain the condit J11 of partial re between the valves, or rstore it it old be interrupted from any cause, and will. arrangedinvarious ways for this purpose, or that ot, or means could be used forthe same purpose, and it will also be evident that by bah-inch); the'iressure of one valve against the or by connecting them by a' shaftsuch if as above described, the spring; may (:1 1' a larger part orindeed rotany valves rotated by a shaft to which I the whole of theseating pressure, depending upon the.circumstances of the design.

The pressure of the valves against their re- I (Ether and subject to thechamber pressure in opposite directions, onewof saidfvalve memberspresenting a larger pressure area,

than the other, wherebv saidunited valve, members-are subject todifferential pressure,

and valve seats to which the valves are .held

by such differential pressure.

:2. In apparatus of the kind described, the

combination with a pressure chamber of two eacl'iis secured andsubgecflto the chamber re forming the crevice or 1e cylinder pressuremay ran-V becbvious that it may be ettectiv'e pressure are: II "0 t forsuclrvalves and means independent I pressure in opposite directions, oneof said valves presenting a larger pressure area than I I the otherwhereby both are subject to ,a dif ierential pressure, and valve seatsto which,

the valves are held by such differential pres; 81}

sure. 1

3. Inapparatus combination with a, pressure chamber, of

two rotary valves united to eachkfihe'r and subject to fluid pressure inopposite directit-3,15,0116 of such valves presenting alarger than the0ther,av alve v l ,fiuid pressure for urging the valv'es upon theirseats.

4-. In apparatus combination with two rotary valves pressure indirections tending'tc balance ti: pressure acting on one of saidVzilVesof the kinddescribed, the

I I I I j donu'eoon Witnesses: Y

(i; A. TAYLOn,

11 GRANT.

the kind described, the

a pressure chamber-{of i I sutuectto the same 1nd I 6 I, inst thatacting on the other, theva'lves II i being connected together sothat'pressure

